title: Significance of perigastric lymph node involvement in periampullary malignant tumor.
mesh_terms: D000328:Adult; D000368:Aged; D014670:Ampulla of Vater / Q000473:pathology*; D001650:Bile Duct Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000473:pathology* / Q000601:surgery; D016577:Pancreaticoduodenectomy; D012189:Retrospective Studies; D013270:Stomach